Four imidazolium-type ionic liquids (ILs) [Emim][NTf₂], [Emmim][NTf₂], [Bmim][NTf₂] and [Bmmim][NTf₂] have been synthesized and used to prepare binary mixtures with organic solvents dimethyl carbonate (DMC), Diethyl carbonate (DEC), and propylene carbonate (PC), respectively. The electrical conductivity and refractive index of the mixtures were measured and discussed from 293.15 to 323.15 K. The dependence of electrical conductivities of the binary mixtures on the concentration of mole fraction and temperature were fitted from the empirical Casteel-Amis (CA) equation and Vogel-Fulcher-Tamman (VFT) equation, respectively. The maximal conductivities were discussed from the fitted values for the ILs with different solvents. The dependence of refractive indexes of the binary mixtures on the concentration of mole fraction and temperature were also fitted from the Redlich-Kister polynomial equation and linear equation. Moreover, the influences of introducing methylene and methyl into the cation of ILs on their properties are discussed.

四种咪唑鎓型离子液体 (ILs) [Emim][NTf ₂ ]、[Emmim][NTf ₂ ]、[Bmim][NTf ₂ ] 和 [Bmmim][NTf ₂] 已被合成并分别用于制备与有机溶剂碳酸二甲酯 (DMC)、碳酸二乙酯 (DEC) 和碳酸亚丙酯 (PC) 的二元混合物。在 293.15 至 323.15 K 范围内测量和讨论了混合物的电导率和折射率。根据经验 Casteel-Amis (CA) 方程和 Vogel 拟合了二元混合物的电导率对摩尔分数浓度和温度的依赖性-Fulcher-Tamman (VFT) 方程，分别为。最大电导率是根据不同溶剂的 IL 的拟合值讨论的。二元混合物的折射率对摩尔分数浓度和温度的依赖性也由 Redlich-Kister 多项式方程和线性方程拟合。而且，